xcb 2.4-4build1 (amd64 binary) in ubuntu feisty

 xcb provides easy access to the cut buffers built into every X server.
 It allows the buffers to be manipulated either via the command line,
 or with the mouse in a point and click manner. This version is also
 utf-8 capable.
 .
 Homepage: http://www.goof.com/pcg/marc/xcb.html